gn: Remove Scheduler::pool().

tools/gn/input_file_manager.cc

Index: tools/gn/input_file_manager.cc
diff --git a/tools/gn/input_file_manager.cc b/tools/gn/input_file_manager.cc
index c695655658dc13988c94d66ef0bbd068fe68648f..9fd3def7cc7c8d4bd0fc9d3ee615ab15b2790ba5 100644
--- a/tools/gn/input_file_manager.cc
+++ b/tools/gn/input_file_manager.cc
@@ -147,9 +147,7 @@ bool InputFileManager::AsyncLoadFile(const LocationRange& origin,
       }
     }
   }
-  g_scheduler->pool()->PostWorkerTaskWithShutdownBehavior(
-      FROM_HERE, schedule_this,
-      base::SequencedWorkerPool::BLOCK_SHUTDOWN);
+  g_scheduler->ScheduleWork(schedule_this);
   return true;
 }